Implemented -DPROJECT_NAME_SHOW_GIT_COMMIT_PARENTS option (TriBITSPub…

…#597)

Implemented usage of previously added global cmake variable,
`PROJECT_NAME_SHOW_GIT_COMMIT_PARENTS` in `tribits_generate_single_repo_version_string`.

This is done with an optional argument named INCLUDE_COMMIT_PARENTS whenever
calling `tribits_generate_single_repo_version_string`

test/core/ExamplesUnitTests/TribitsHelloWorld_Tests.cmake

@@ -123,6 +123,7 @@ tribits_add_advanced_test( TribitsHelloWorld_config_git_version_single_repo_two_
       -DTribitsHelloWorld_TRIBITS_DIR=${${PROJECT_NAME}_TRIBITS_DIR}
       -DTribitsHelloWorld_ENABLE_TESTS=ON
       -DTribitsHelloWorld_GENERATE_REPO_VERSION_FILE=ON
+      -DTribitsHelloWorld_SHOW_GIT_COMMIT_PARENTS=ON
       -DGIT_EXECUTABLE=${${PROJECT_NAME}_TRIBITS_DIR}/python_utils/mockprogram.py
       ../TribitsHelloWorld
     PASS_REGULAR_EXPRESSION_ALL

tribits/core/package_arch/TribitsGitRepoVersionInfo.cmake

@@ -170,16 +170,23 @@ endfunction()
 # Usage:
 #
 #   tribits_generate_single_repo_version_string(<gitRepoDir>
-#     <repoVersionStringOut>)
+#     <repoVersionStringOut> INCLUDE_PARENT_COMMITS [ON|OFF])
 #
-# If the latest commit contains more than one parent, this function
-# will also include formatted output of the commit info of those
-# parents.
+# If the optional argument ``INCLUDE_PARENT_COMMITS`` is passed,
+# then the head commit's parent(s) info will be be included in
+# the repo version output string formatted.
 #
 function(tribits_generate_single_repo_version_string  gitRepoDir
    repoVersionStringOut
   )
 
+  cmake_parse_arguments( PARSE_ARGV 2
+    PARSE "INCLUDE_COMMIT_PARENTS" # prefix, optional
+    "" "" # one_value_keywords, multi_value_keyword
+    )
+  tribits_check_for_unparsed_arguments()
+  tribits_assert_parse_arg_zero_or_one_value(PARSE INCLUDE_COMMIT_PARENTS)
+
   tribits_assert_git_executable()
 
   # A) Get HEAD commit's info
@@ -209,13 +216,14 @@ function(tribits_generate_single_repo_version_string  gitRepoDir
 
   # C) Get each parent's commit info and format the output
 
-  if (headNumParents GREATER 1)
+  if (PARSE_INCLUDE_COMMIT_PARENTS)
 
     set(parentIdx 1) # Parent commit indexes are 1-based by git
 
     foreach(parentSha1 IN LISTS headParentList)
 
       # C.1) Get parent commit info string
+
       tribits_generate_commit_info_string(
         ${gitRepoDir} ${parentSha1}
         commitInfoString)
@@ -226,8 +234,7 @@ function(tribits_generate_single_repo_version_string  gitRepoDir
         "\n    *** Parent ${parentIdx}:")
       string(REPLACE "\n" "\n    "
         commitInfoString "${commitInfoString}")
-      string(CONCAT outStringBuilder
-        "${outStringBuilder}" "\n    ${commitInfoString}" )
+      string(APPEND outStringBuilder "\n    ${commitInfoString}" )
 
       math(EXPR parentIdx "${parentIdx}+1")
 

tribits/core/package_arch/TribitsGlobalMacros.cmake

@@ -1219,9 +1219,14 @@ function(tribits_generate_repo_version_file_string  PROJECT_REPO_VERSION_FILE_ST
 
   set(REPO_VERSION_FILE_STR "")
 
-  tribits_generate_single_repo_version_string(
-     ${CMAKE_CURRENT_SOURCE_DIR}
-     SINGLE_REPO_VERSION)
+  if (${${PROJECT_NAME}_SHOW_GIT_COMMIT_PARENTS})
+    tribits_generate_single_repo_version_string(
+      ${CMAKE_CURRENT_SOURCE_DIR}
+      SINGLE_REPO_VERSION INCLUDE_COMMIT_PARENTS)
+  else()
+    tribits_generate_single_repo_version_string(
+      ${CMAKE_CURRENT_SOURCE_DIR} SINGLE_REPO_VERSION)
+  endif()
   string(APPEND REPO_VERSION_FILE_STR
     "*** Base Git Repo: ${PROJECT_NAME}\n"
     "${SINGLE_REPO_VERSION}\n" )